Fixture stud



Feb. 14, 1928.

G. c. THOMAS, JR 1659060 FIXTURE STUD Filed May 1o, 1926 r INVENTORGeorge C. zomas, fr:

9, f Wi/U oRNEYs ST'EES GEORGE C. TEGMAS, JE., OF ELEZAB'ETH, NEVIJERSEY, ASSGHOR t BETTS CO., OF ELZABETH, NEW' JERSEY, A CORPGRATIOT OlFIXTURE STUD.

Application filed May 10,

rlhis invention relates to lixture studs or use in connection withelectrical outlet boxes and which used for installing an electric lightfixture to be suspended from the out* let bon.

One of the main purposes of this invention is to produce a nature studcapable oit being anchored to the box bv working from below `and 'frominside the boi; so that the mechanic on the job vmay quickly andconvenientl'jT place the fixture stud in the box hole and anchor ittherein after the bon has been mounted on the cealing.

is also an object toproduce a iixture stud capable of being` anchored toa box without employing screws and which embodies a suspension plateanchor member capable oit being introduced through the bor; hole andoverlie or lap across the boi; hole edge on top of the box and on theoutside thereof.

1With the above and other objects in view, there is shown an example otthe invention in the accompanying drawings wherein:

lligure 1 shows a longitudinal sectional view through the fixture studwith the parts in separate alignment ready to be brought together inassembled relation.

lFigure 2 shows an inside plan view ot a box with the iiXture studassembled therein.

Figure 3 shows a vertical longitudinal section ot the box with thelixture stud anchored therein.

Figure 4L is a top or plan view of the box looking down 'troni theoutside thereof which shows the suspension plate anchor member overlyingthe edge of the box hole.

l'teiferring` further to the drawing7 there is shown a tirture studincluding a threaded sleeve 6 cored out or provided with the hole 5through which the screw 12 may be passed. The sleeve G constitutes asupport for electric fixtures to be suspended 'from an outlet bex l?,and is usuallf,T threaded for that purpose. The threaded sleeve 6 issurmounted b v and integral with a box hole boss 'l' carrving a vflange.dish or abutment 8 integral with the sleeve between the boss .7 andsleeve 6. ln other words the circular iiange 8 or other abutment meansis disposed between the boss and iiiture stud sleeve 6. il locking reacharm 9 is integral with the iiziture stud casting 5 and includes acentering` boss 10 to engage a hole 16 in the boi; B to prevent thefixture stud from turninglin 1925. Serial No. 107,857.

the bon when the lightiin service position. lt is preierred that thealnitinent 8 carryv the reach arm 9 and centering boss 10 since thelatter two parts torni in effect a part ot the abutment means which istoo large to pass through the box hole rests positivelj.v on one side ofthe box wall.

The screw 12 ra through the sleeve 6 and threads into a suspension plateanchor member or plate nut 13. The elongated suspension plate or nut 13may to advantage be made oblong havin a major axis somewhat greater thanthe d .mieter ot the outlet hole H in the box ll while its minor axis isslightly less than the diameter or1 the hole H inthe bon. rEhe plate nut13 mav therefore be inserted through the box hole H 'from below or frominside the box so as to overlie tae b fr: hole on the outside thereof.The plate nut 13 is provided with a threaded center hole 14 Jfor thereception of the screw 12.

rl'he lixture stud is therefore capable of g iintuie is installed beingmounted in the box B b v working entirelx7 from below or from inside theboX as will be seen. ln inserting the liziture stud from the inside ofthe box, the screw 12 is passed through the sleeve G and screwed intothe nut 13 until all three parts comprising`- the fixture stud structureare connected together. The screw 12 is rotated a short distance onl7into the suspension plate 13 which provides considerable clearancebetween said plate and top surface ot the {iX- ture stud bex hole bossT, and this clearance permits the mechanic to hook the suspension plate13 through the bof; hole il. after which the screw 12 is run up tighttoclamp the plate 13 down tight on the outside ot the bon.

The reach arm mounts the centering boss 7 out awav trom the fixture studso that this boss reaches the smaller bott hole 1G and projects throughit to loclz the fixture stud sleeve 6 against rotation in the bon. It issignificant that the dish or flange 8 covers the bon hole l-l from thebottom and inside the box. and tor this reason the bon is closedregardless ot the size of the suspension plate 13 mounted on the outsideot the box. lt is observed that the suspension plate 18 may not quitecover the hof; hole H from the outside since said plate mav be smaller.as

'to one of its dimensions at least, than 4the box hole', but any exposedportion of the-box hole edge left uncovercdby the plate 13 is` Vsealedby the flange 8.

When the screw 12 is tightened up, the

box hole boss? and abutment 84 shoulders-v into the hole and against theouter rim surface thereof and the arts V8 and V13 are clamped and drawnfast upon the box wall therebetween.- ln this wayflv provide a iix- Yture stud comprising one part small enough to go througl'i the boxholeand another part too large therefor. The smaller Vpart V13 carriesVthe load of the electric lixture'suspended from the box B while theyboss 7 and abutment 8 braces the fixture stud iii the box in a rigidposition.

W hat l claim is v1. ln combination with an outlet box having a hole toreceive afixture stud, a suspension member mounted onthe outside andover said box hole and suitable in size toy be inserted through the boxhole from .thev inside of the. box, a disk inside the box covering thehole and i'ittingagainst-the inside s' box wall, a fixture supportdependingV integrally from the disk, means included on the-fixture studreaching' away therefrom 1 projecting into Vanother hole of the box fromthe ins-ide to lock the' fixture stud against rotation, and a screwpassing through the fixture'v support and disk Vand through vthe boxhole and screwed into the suspension member.

2. Incombination with an outlet box having a hole to receive a fixturestud, an elongated plate mounted on the outside and over said hole; afixture support mounted insidev the box, includ-ing a flange overlyingthe box hole edge sealing said hole, including a box hole Vboss carriedby the flange and fitting into the box hole, and including a fixturesupport depend-ing from the flange and box hole boss; and a screwpassingV through the fixture support, flange, and box hole, an-dthreaded into the Velongated plate.

3. Arlixture stud comprising, a threaded sleeve to which may be attachedelectric lixtures, an abutment integral with one end of the sleeve Vandlarger than a standard outletv box hole and adapted to overlie Va'boxhele inside a'box, a box hole boss included on the abutment thereabove,an elongated nut capable of being passed through a box hole and overliethe hole on the outside of a box wall, and a screw mounted inthe vsleeveand threadedinto the elongated nut drawing together said nut and theVbox hole boss.

l.' A fixture stud comprising,a sleeve to support electric fixtures, aflange on one end of the sleeve'somewliat larger than a standard outletvbox hole and adapted to abut and overlie a box hole inside the box, acentering boss included on the flange and adapted to lit into anotherboxhole from'inside thereof,

' pension member.

f 1,659,060v v a nut capable of being passed through a box hole butoverlie the hole on the outside of a box wall, and a screw mount-edinthe sleeve and threaded into the nut drawing together the nut and theflange against b otli sidesv o Y 6. A fixture stud comprising, a fixturesupport sleeveY surm-ounted by a box hole Y boss, including abutmentmeans therebetween of largerV diameter than that of the sleeve, andlarger than the boss, also including an arm, on the outer end of whichis formed a boss smaller than the first named boss, both bosses havingparallel axis, an oblong plate l'iaving a threaded hole in the center'thereof and mounted on thel sleeve above the flange and box holeboss,and. a

screw passed through the sleeve and screwed into the plate.

7. In combination with a box having a holeiito receive 'a fixture stud,of a suspension member of such'sizex as will fit through the box holeand overlie the edge thereof on the other side, a fixture supportingsleevek including a boss' on one end to register within the box. hole,abutment means included on the sleeve resting against the boxV wall andon the side thereof opposite toy thatof the suspension member to anchorthe fixturek stud against lengthwise' displacement in one direction, a:screw passed through the sleeveY and secured to the suspension member todraw together the abutment means and suspension member, anda centeringboss Vcar-v ried on the fixture stud reaching out therefrom and fittinginto vanother Vhole in the box wall to lock theYV sleevejagainstturning( 8; A xture-stud comprisinga support memberv adapted to carry anelectric fixture to be suspended from outlet box, including abutmentmeans on oneend of the support member which4 abutment is adapted to restagainst one side of Va box wall and too ylarge to pass through aboxhole, a suspension plate of such size as will pass through a box holeand overlie said hole on Vthe other side vof the box wall, a singlescrew anchoring together the abutment means andl Vsus-Vv pension plate,and means to lock the fixture stud against rotation. Y

in testimony whereof laflix my signature.

GEORG-E lC. THOMAS, Jn.

